There must have been thousands of these across the country when the Ordnance Survey did the post war revision. What has survived and where is a moot point. OS^▸ (Ordnance Survey) appears to have been quite "careless" in preservation of their paper records in their moves of headquarters. I asked recently about the location of an aerial photograph, date, flight number & frame number supplied. No sensible reply, look on the internet? It is the only photograph I have without a flight list, most annoying. Somewhere round Reading in the late 1990's. No doubt another case like the "what is roll film".